<?php function can_write_wall(&$a,$owner) { static $verified = 0; if((! (local_user())) && (! (remote_user()))) return false; $uid = local_user(); if(($uid) && ($uid == $owner)) { return true; } if(remote_user()) { // user remembered decision and avoid a DB lookup for each and every display item // DO NOT use this function if there are going to be multiple owners if($verified === 2) return true; elseif($verified === 1) return false; else { $r = q("SELECT `contact`.*, `user`.`page-flags` FROM `contact` LEFT JOIN `user` on `user`.`uid` = `contact`.`uid` WHERE `contact`.`uid` = %d AND `contact`.`id` = %d AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0 AND `user`.`blockwall` = 0 AND `readonly` = 0 AND ( `contact`.`rel` IN ( %d , %d ) OR `user`.`page-flags` = %d ) LIMIT 1", intval($owner), intval(remote_user()), intval(CONTACT_IS_SHARING), intval(CONTACT_IS_FRIEND), intval(PAGE_COMMUNITY) ); if(count($r)) { $verified = 2; return true; } else { $verified = 1; } } } return false; } function permissions_sql($owner_id,$remote_verified = false,$groups = null) { $local_user = local_user(); $remote_user = remote_user(); /** * Construct permissions * * default permissions - anonymous user */ $sql = " AND allow_cid = '' AND allow_gid = '' AND deny_cid = '' AND deny_gid = '' "; /** * Profile owner - everything is visible */ if(($local_user) && ($local_user == $owner_id)) { $sql = ''; } /** * Authenticated visitor. Unless pre-verified, * check that the contact belongs to this $owner_id * and load the groups the visitor belongs to. * If pre-verified, the caller is expected to have already * done this and passed the groups into this function. */ elseif($remote_user) { if(! $remote_verified) { $r = q("SELECT id FROM contact WHERE id = %d AND uid = %d AND blocked = 0 LIMIT 1", intval($remote_user), intval($owner_id) ); if(count($r)) { $remote_verified = true; $groups = init_groups_visitor($remote_user); } } if($remote_verified) { $gs = '<<>>'; // should be impossible to match if(is_array($groups) && count($groups)) { foreach($groups as $g) $gs .= '|<' . intval($g) . '>'; } $sql = sprintf( " AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' ) AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' ) AND ( allow_gid = '' OR allow_gid REGEXP '%s' ) AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s') ", intval($remote_user), intval($remote_user), dbesc($gs), dbesc($gs) ); } } return $sql; }